论文部分内容阅读
采用超临界CO2流体作传输介质,二苯基二硫(DD)作脱硫剂,研究了废旧丁基橡胶的脱硫再生。结果表明,所得丁基橡胶再生胶(RIIR)不能被硫黄硫化,但能被树脂硫化。在丁基橡胶(IIR)的硫黄硫化过程中,DD不能用作硫化剂和硫化促进剂,其对硫化过程有明显的抑制作用。采用丙酮抽出残留DD后,RIIR可被硫黄硫化。针对IIR/RIIR并用体系,分别以硫黄和树脂作硫化体系且用量相同时,树脂硫化体系的交联密度明显高于硫黄硫化体系。
Using supercritical CO2 fluid as the transmission medium and diphenyl disulfide (DD) as the desulfurizing agent, the desulfurization regeneration of waste butyl rubber was studied. The results show that the resulting butyl rubber reclaimed rubber (RIIR) can not be sulfur cured, but can be resin cured. During the sulfur vulcanization of butyl rubber (IIR), DD can not be used as a curative and vulcanization accelerator, which significantly inhibits the vulcanization process. RIIR can be sulfur cured by extraction of residual DD with acetone. For IIR / RIIR system, when the sulfur and resin were used as curing system respectively and the same dosage was used, the crosslinking density of resin curing system was obviously higher than that of sulfur curing system.